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  1. Vehicle Suspension
  2. SuperSprings Intl
  3. Bump Stops
  4. Towing/Load Leveling
  5. Rear Axle Suspension Enhancement
  6. Light Duty
THIS ITEM IS NOT A FIT FOR
2005 Lexus IS 300
SuperSprings Intl

SumoSprings Solo Custom Helper Springs - Rear Axle

Part Number: SS76MR
In Stock
$213.99
Vehicle Suspension
Not Confirmed to Fit

2005 Lexus IS 300

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1,000-lb Capacity. Upgrade your vehicle's rear suspension with these maintenance-free helper springs. Sturdy microcellular urethane springs cushion bumps and help support a heavy load to level your ride and minimize sway. No-drill installation. Great Prices for the best vehicle suspension from SuperSprings Intl. SumoSprings Solo Custom Helper Springs - Rear Axle part number SS76MR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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SuperSprings Intl Vehicle Suspension - SS76MR

  • Bump Stops
  • Towing/Load Leveling
  • SuperSprings Intl
  • Rear Axle Suspension Enhancement
  • Light Duty
  • Suspension Only

1,000-lb Capacity. Upgrade your vehicle's rear suspension with these maintenance-free helper springs. Sturdy microcellular urethane springs cushion bumps and help support a heavy load to level your ride and minimize sway. No-drill installation.


Features:

  • Helper springs upgrade your vehicle's rear suspension for improved driver control and comfort
    • Keep your vehicle level when you're towing or hauling a heavy load
    • Help to absorb bumps and shocks
    • Minimize sway
  • Progressive load control - springs compress according to the weight of your cargo
    • Lighter loads - springs compress easily at first for soft engagement and a less bumpy ride
    • Heavier loads - springs compress by as much as 80 percent for support
  • Springs work independently from each other to compensate for off-center loads and reduce body roll during sharp turns
  • Durable microcellular urethane
    • Works in temperatures from -25 F to 200 F
    • Resists damage caused by oils, road salts, and UV rays
  • Minimal lateral expansion - springs compress vertically instead of to the sides so they aren't easily damaged when operating in tight spaces
  • Maintenance-free - no tubing to run or air pressure to monitor like with air springs
  • Simple, no-drill installation
  • 2 Jounce-style springs included
  • Made in the USA


Specs:

  • Weight capacity (at 50-percent compression): 1,000 lbs
    • SumoSprings will not increase your vehicle's weight-carrying capacity
  • Limited lifetime warranty
  • 30-Day satisfaction guarantee


Rear Suspension Support

Towing or hauling a heavy load can cause rear sag as your factory suspension compresses under the weight of the load. This means that the rear axle is trying to support not only the extra load but also the weight of your vehicle. And because there is less weight on your front axle, your front tires make less contact with the road, which causes problems with traction, steering, and braking. SumoSprings upgrade your vehicle's factory suspension to level your vehicle, improve driving performance, and keep your ride comfortable.


Installed spring when it is not compressed

SumoSprings provide progressive load control - the more you load them, the stiffer they become. With a lighter load, the springs will compress easily for soft engagement and a less bumpy ride. The closed-cell urethane material allows for smooth contact between the springs and your vehicle. And the springs act like a shock absorber to dampen road vibration.


Installed spring when it is compressed

The springs can also compress by as much as 80 percent to support a heavy rear load and to help your factory suspension bear up under the load. This evens out the weight, which levels your vehicle and ensures that your front tires are making better contact with the road. A level ride means that you have improved driving control, ensures safe headlight aim, and helps to minimize sway. The springs also support your factory suspension, which helps prevent sagging and reduces bottoming out.


The springs work independently from one another to support each side of your vehicle. This action helps to reduce body roll when you make a sharp turn. This also helps compensate for an off-center load.


Durable, Custom-Fit Springs

These microcellular urethane springs are tough. They resist abrasion, oil, salt, and UV rays that can more quickly wear out other springs, and they perform well in temperatures ranging from -25 F to 200 F (-33 C to 93 C).


SumoSprings compress vertically with minimum expansion to the sides, so they won't be damaged by nearby mechanical parts and they fit safely into tighter spots. And unlike air springs, SumoSprings require no maintenance or adjustment.


The helper springs are custom designed to fit your vehicle, and they install easily - no drilling required.



SSR-141-40 SuperSprings Sumo Springs Solo Rear Vehicle Suspension Kit for Trucks

Installation Details SS76MR Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:

Ratings & Reviews

4.7

23 reviews
1,000-lb Capacity. Upgrade your vehicle's rear suspension with these maintenance-free helper springs. Sturdy microcellular urethane springs cushion bumps and help support a heavy load to level your ride and minimize sway. No-drill installation.

by:

I've been very pleased with my sumo springs! Put them on my 2019 ford randger and drove fully loaded 7.5k trailer from Oregon to Indianapolis and the setup drove great. Very little squate,very comfotable, and safe. Now the truck drive stiffer but not bad I still have them on and I hardly ever tow anything anymore.

Victoria H. profile picture

Victoria H.

3/19/2025

Sounds like these helped get the job done well for you, Andrew! That's quite the road trip, did you get to see anything memorable along the way?



by:

Easy shopping, fast shipping.



by:
2021 Chevrolet Silverado 1500

Don’t shear the bolts off!!!!!

After
drilling out the rusted bolt I sheared off removing the old bump stops, they installed quickly and easily. I soaked the other bolt in penetrating oil and it did not shear off. That one installed easily.

Have about 1500 miles towing with these, what a difference. It really makes towing much more stable. It does ride stiffer unloaded, but it not terrible.



by:
2020 Ford Ranger

Works great on 2020 ford ranger. Left out the extra spacer because I don't want it riding on the leaf spring all the time. This gave it almost an inch clearance before the sumo touches and starts to help. That is what I wanted to not have it as stiff initially offroad, etc.

Wes profile picture

Wes

6/3/2024

Still. holding up like new about 15k miles later with towing and loads.



by:

These made a huge difference. I towed a travel trailer and the roads around me are pretty horrible. These springs made a big difference in our ride comfort and I couldn’t even tell they were there when unloaded. I highly recommend these if you tow on a regular basis.



by:
2021 Ford Ranger

These were a great replacement for the included OEM bump stops that were basically worthless. I was able to max out towing capacity without blinding oncoming traffic. Handling is greatly enhanced while towing. Install was incredibly quick and easy by removing the wheels for direct access. Only drawback is unloaded ride is now a little harsh.



by:
2020 Ford Ranger

They do a good job. After the install we brought home a ton of home heating pellets on our utility trailer. Barely any rear suspension drop at all. They're a simple part that's easy to install and they do the job. One tip tho, be sure to heat the old bolts to ease the removal of the original parts.



by:

After a year, very good suspension enhancement. The initial install was a pain only because I sheared the factory bolt in the original bump stop trying to remove it. Had to drill out and re-tap for new Sumo spring bolt.



by:
Ford Ranger

Put on Sumo springs helper springs on my 2022 Ford Ranger and it was easy to install. They work great on hitting any bumps and when pulling my travel trailer. Would recommend them for sure.



by:

Helped reduce squat on tow vehicle while towing which is just what we wanted.



by:
2023 Ford Ranger

Used for '21 ford ranger for towing 5500lb travel trailer. Helps with squat and ride, good option. Didn't use 1/2 puck, but will need to go back and add to further reduce squat.



by:
2019 Ford Ranger

These are too stiff for a Ranger. Feels like driving around on your bumpstops.



by:
Nissan Leaf

Great service and great products always from you guys
Factory bump stops too short with new leaf pack this solved the problem



by:

The product is perfect and It arrived here sooner than the tracking indicated.



by:

Fits great, 20 minute install. Works as advertised. Whats not to like?



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2011 Forest River Stealth TT Toy Hauler



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See what our Experts say about this SuperSprings Intl Vehicle Suspension

  • Will Jounce-Style Springs Fit a 2021 Ford Ranger with Tremor Package
    According to my research the SumoSprings Solo Custom Helper Springs # SS76MR will fit with the Tremor package on your 2021 Ford Ranger, but the Tremor model sits about 1" taller than the standard Ford Ranger so the SumoSprings may not end up engaging like they should. Since this is the case I recommend going with the Timbren Active Off-Road Bumpstops # T98FR instead and using the 1" Spacer # A25723-90AH00 to help take up that extra space, but you will need to pick up a longer M10 bolt...
    view full answer...
  • 2021 Ford Ranger SumoSpring Recommendation for Towing a Trailer with Weight Distribution
    Since the only difference between the SumoSprings Solo Custom Helper Springs # SS76MR and # SS86MR is the weight rating (the former being 1,000 lbs and the latter being 1,500 lbs) I recommend going with the lighter option - part # SS76MR. It would be good to double check the weight rating for your weight distribution system (WDS) prior to swapping out your suspension enhancement. The Timbrens have been known to make the ride a bit more stiff but if your WDS is rated too high then that's...
    view full answer...
  • Is Part SS86MR The Same as SSR-141-47 For SumoSprings on 2019 Ford Ranger
    The two parts you mentioned are indeed the same; the SSR-141-47 is the SumoSprings Solo Custom Helper Springs - Rear Axle # SS86MR. The # SS86MR is just the part number we use for these SumoSprings on our site, but they are the 1,500 lb capacity SuomSprings that fit your 2019 Ford Ranger. We do have the 1,000 lb capacity SumoSprings that fit your '19 Ranger as well, which are the SumoSprings Solo Custom Helper Springs - Rear Axle # SS76MR. I have added links below to video reviews and...
    view full answer...
  • How To Prevent Trailer Bounce While Towing with a 2021 Ford Ranger
    A simple set of suspension enhancements should help tremendously with bounce while towing with a 2021 Ford Ranger. I recommend the SumoSprings Solo Custom Helper Springs part # SS76MR which provides a bit of cushion as well as support without sacrificing ride quality. They are also simple to install and cost effective. If you have issues with sag/squat or trailer sway then you can look into a weight distribution system but these require more setup each time and can restrict turning and...
    view full answer...
  • Will Lower Rated Spring Bars Help With a Wiggly 2021 Ford Ranger Towing Wolf Pup Camper
    When it comes to weight distribution, tongue weight is the most important factor. In this case, it doesn't sound like the spring bars need to be swapped out. Although I don't know the exact model of your camper, the tongue weight is going to be 10-15% of the loaded weight of your Wolf Pup. It will also include the weight of any cargo behind the rear axle of your tow vehicle. The # FA94-02-0899 spring bars used on the Fastway e2 Weight Distribution w/ 2-Point Sway Control # FA94-00-0800...
    view full answer...
  • Can SumoSprings Kit be Used with 2021 Ford Ranger with Weight Distribution System
    Suspension enhancement like the SumoSprings Kit part # SS76MR that fits your 2021 Ford Ranger will help with the porpoising that you are experiencing when towing. You will end up needing to use slightly less spring bar tension to compensate for fact you now basically have stiffer suspension. So that would mean lengthening the chains. We can't say by how much you'd lengthen it though.
    view full answer...

Do you have a question about this Vehicle Suspension?


Info for this part was:

Employee Jeff D
Installed by:
Jeff D
Employee Jacob H
Installed by:
Jacob H
Employee Jameson C
Expert Research:
Jameson C
Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video Edited:
Chris R
Employee Jonathan Y
Video Edited:
Jonathan Y
Employee Wilson B
Updated by:
Wilson B
Employee Daron K
Edited by:
Daron K
Employee Alex H
Written by:
Alex H
Employee John S
Video by:
John S
Employee Thomas T
Video by:
Thomas T
Employee Bradley B
Test Fit:
Bradley B

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